Questions & Answers about Petak mi je slobodan.
Mi is the unstressed dative form of ja (I / me). Here it means to me or more naturally for me.
So the sentence is literally something like:
Friday is free to me / for me.
In natural English, that usually becomes:
I’m free on Friday or Friday works for me / Friday is free for me.
This dative structure is very common in Serbian when talking about how something relates to a person.
Because in this sentence petak is the grammatical subject.
The structure is:
- Petak = Friday
- mi je = is to/for me
- slobodan = free
So the sentence is literally built as:
Friday is free for me.
If you say u petak, that means on Friday, and the sentence would be built differently, for example:
- Slobodan sam u petak. = I am free on Friday.
Both are natural, but they are different sentence structures.
Here petak is in the nominative singular, because it is the subject of the sentence.
That is why the adjective also agrees with it: